Planoqraph co



G. S. KENT.

BOILER FURNACE. APPucATloN man 00.1.19.1x6.

Patented Aug. 5, 1919.

3 SHEETS-SHEET l.

THE COLUMBIA PLANUGRAPH co.. wASmNm-QN, n. c,

G. S. KEN1. 'BolLER FuRNAcE. APPLICATIUN FILED OCT. 19.\9l6.

Patented A110". 5, 1919.

3 SHEETS-SHEET 2.

' 'WE COLUMBIA VLANOGRAPH co., wAsnlNtx'roN, D., c.

G. S. KENT.

BOILER FURNACE. APPLICATION man ocT.19'. i916.

Patented Aug. 5, 1919.

3 SHEETS-SHEET 3,.

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-. furnaces of this kind in p the header. e e e e e l A represents aboiler of any usual or suit' IIN ED STATES PATENT oEEToE y' encuen SAMUELKENT, 0E BUEFALQ NEW YORK# `:soinsaereitunen.` i

To all wlw/m t may concern: i

Be it known that I, GEORGE S..I{ENT, a citizen of the United States; `residing at Buffalo, in the county of Erie" and State of New York, have invented a new anduseful Improvement in Boiler-Furnacesof which the following is a specification. e

This invention relates to furnaces of the kind which are used in connection with steam boilers and in `which the draft passes first through the green fuel and then through the hotter parts of .thefuel` 'Ihe object of the invention is to provide a furnace ofthis kind having a single fire place in which the fire or burning fuel is confined by means of waterbars or. tubes arranged at the sides of the burning fuel and between'which the products of combustion pass to opposite sides ofthe fire or fuel; also to provide afurnace structure in which the water bars or tubes canbe easily re-` movedand replaced; `also to improvethe construction of the `water bars and `the inane-` ner of placing the bars into their `operative positions in the furnace;` also to construct the parts of `the furnace in such a manner` as to support the fireor burning fuel to a certain extent independently of the grate bars, to facilitate the removing of clinkers` or the like; also to improvethe arrangenient of the fuel door` of the furnace in such a manner as to enable thesame to distribute the draft or incoming air uniformly over the fire; also to improve thje construction of other respects hereinafter specified. 0

In the accompanying' drawings:` l Figure` l is a front elevation of a boiler furnace embodying the invention." 1 U Fig. 2 is afragmentary, cer'itra'l,` longitudinal sectional elevation thereof.`

tion on line 3-3, Fig. 4;

Figg is a longitudinal, sectional,` eleva- Fig L1 is adfront elevationfof the boiler furnace embodying the invention, having the front wall ofthe furnace removed; e

Fig.' 5 is a deta-ledview, on an enlarged scale, of a water bar or tube* showingfthe connections with #the upper and lower headers.

Fig. 6' is a transverse, sectional, elevation of one of the upper. headers of thekfurnace, showing the jointl between the boiler and p Specification of Letters Patent.3 p `PageIi-jed Aililg. `5, 1919.` Application filed October 19, `1.91K?. Serial No. 126,491. i

able co1istruction,tliat shown having lire tubes'u/ through which the products of combustionpass from `the rear to the front of the boiler. The boiler and furnace are`inclosed the usual manner, for "example,` by means of side. walls c', a rear wall a2 and upper and lower" front walls" or plates a?" at. The housing of the boiler alsoincludesthe usual lire wall c5 which extends fromside to p side ofthe boiler housing Yand'"which causesthe hot products of combustion to pass upwardly over the wall in proximityto the boiler. `All of these partsniay be of any suitable or usual construetion.` y e The furnace, which is arranged under the boiler, consists of a central fire chamberlB and an ash pit l) arranged under" the fire chamber and separated therefrom by` means 0f a grate b. `'Ihe fire is` confinedwithin the fire chamber by `means of a plurality of water bars or pipes C arranged.in;` rows :at opposite sides `of the fire chamber, the water bars or pipes beingspaoed `at short intervals from each other So as to leavel spaces be-` tweenthen'bars through ,which the gases of combustion can pass.The upper rear end of the fire chamber is closed bymeans of a wallfz projecting above 'the firewall a5 which causesthe air` which is admitted to the fire chamber abovethe fuel to pass downwardly "first through the greenI fuel, then down through the hot portions ofqthe` fuel and `outl of theY lire chamber `between the water bars. The gases of1 combustion then pass over the re :wall and through the re tubes ofthe boiler to the chimney. i L'lhe` water" bars "are secured at their upper ends in headersD and attheir lower ends lin headersgE, eachof the headers pref erably consisting of a single hollow bar eX` tending lengthwisej of the boiler. The upperheaders are connected by means of tubesor pipes d with the boiler; the connec-` tion being preferably made near the upper portion `of the boiler. i In `the construction shown, 'the pipes d are connected `at `their upper ends" with the boiler by removing two of the "iiretubesl .a and utilizing the"` hole in theboiler thus formed to connect the upper ends of thepipes4 d with the boiler. 1 The upperheaders D are preferably constructed asf()"ll0WS`I'w"ifn "i M Each` of" the upper headers D consists of a `long,". `hollow` bar, preferably made of cast steel;i and resting atitsrear end onthe re in and supported by the front wall ofthe boiler.

l portiond, Fig. 6, and a lateral extension or hollow iiange Z2 to which the water bars of the furnace are secured. In order to. secure the water bars inthe lateral extensions of the headers, the extensions are provided with holes d3 through which the water bars or tubes can be passed, and holes d4 at the opposite side of the lateral extension which areJ Substantially.inalinement with the holes dthrough' which the water bars pass and which are adapted tobe closed by means of plugsorfthelike d5. A tube orwater bar when inserted through the hole d3 in the eX- tension islpermanently secured to the header in the usual m'aner by means of an expanding tool or the like, notShown, which may be passed through the hole d4. d represents stay rods or parts which are preferably cast integral with 'the side walls of Vthe. upper water headers for the purpose of preventing t the pressure of the steam from forcing these side walls outwardly.

' Thevupper wall of each water header D is preferably made to rest against the under side of the boiler and is provided with a shallow groove or depressionr Z7 extending lengthwisethereof, which is` filled with some suitablereresisting packing, suchV as asbestos or the like, Vwhich forms a substantially air-tight joint between'the headers and the boiler, yso that any air passing over the'fire is forced to pass downwardly to the fire and cannot' escape between the upper headers and the boiler. YAny other means may be provided for making a tight'joint between the upper headers and the boiler.

The lower headers are constructed in subtantially" the same# manner as the upper header, each comprising a body portion e and a lateral extension or hollow flange c provided with holes e2 for the lower ends of the water ybars C and holes c3 in alinement with the holes e2 and adapted to be closed by means of plugs orscrew capse. Thedowerheadersware also provided with stay rods or members e5. The Alower faces ofthe headers are arranged,- in the construction shown, to restpupontiers or supports es, so that these tiers together withr the body Y portions of the lower headers form: the side jee walls of the ash pit.;-

In order to secure the water bars or tubes tothe upper and lower headers, each of the tubes,Cispreferablymade in'two parts, an`

uigiperI part a :and ia'lower `part 0 the two parts being welded together at theirmeeting edges, asshovvlrA at c2. -`By means of thisk structure the holes'- Z3-,Land c? inthe upper and lower headers can be drilledin/such a manner-thatthewaterbars t accurately into the same. In placingfthek two parts,l of thewater bar v in position, either the vupper Each header has an upper vbody or lower part is first inserted into the hole in the corresponding header and enters into the yhole to a'sufiicient extent to permit the other part of the water bar to be placed into the corresponding hole in the header in a y' direction parallel with the axis of the hole. The two adjacent ends of the water bar are then brought together and welded, after which the ends of the watei` bar may be secured in the headers. By means of this structure the repairing of tho furnace is greatly facilitated, since a defective water bar can be taken out and replaced by a new one without requiring any of the parts of the furnace, with the exception of the plugs or caps Z5 e4, to be removed from the furnace. Y

The feed water for the boiler is preferably fed first to the lower header and then passes upwardly through the water bars into the upper header and into the boiler. Inthe arrangement shown in the drawings, the feed water enters the boiler through a pipe or passage f which terminates in two drums or containers F arranged at the sides of the ash pit, in which drums the solid matter in the feed water .is lgiven a chance to settle.Y The mud drums are connected to the lower headers by means of pipes or tubes f. The'rear ends of the mud drums are prefer- Y ably connected with the bottom of the boiler The front w-all of the boiler may be made of unitary structure or it may be made in two parts a3 and a1 as shown, the two-part construction being preferably employed in case the furnace lis installed under an old boiler, since thenthe front wall or plate in the case of an old boiler can be cut so that the upper portion of the old front wall of the boiler need not be interfered with. The lower portion of the front plate of the boiler is provided with a feed or fuel door G, the usual ash pit door g and man holes g g2 and g3- which afford access to the various parts of the furnace. All of these Iparts may be of any suitable or usual construction. The feed door of the boiler is preferably made as shown in Figs. l and 2 and is pivoted on hinges g4 in such ainanncr as to swing upwardly` when opened. The supply of air to thefire in the furnace lshown is admitted through the feed door and by pivoting the feed door to swing vertically, the draft is uniformly distributed over the fire. In case of a feed' door which is hinged to swing sidewise, the draft would be directed more toward one side of the furnace than toward bridge formed the ire across the flanges the lower` headers theother andwouldcausean uneven burn-` ing of the fuel. Furnace doors o fother suitf able constructions may, however, be ein` ployed desired. l

The upper headers of the furnace erably so arranged i y sions d2' extend inwardly tow-ard eachother, as shown, `and theeXtensions or `flanges of are pref-` so that'the water of the headers incline downwardly and out-l wardly- By means of this,arrangement the nre which is so arranged thatthe fuel `at the top of the fire is located abovethellower portions of the headers `forms an arch rorj space between the lateral manner that" the mass or bridge over the flanges in such a calre of burning coal is ported bythe flanges; moving of a clinker Y grate `bars at thelower portions of the Vlire chamber is greatly facilitated. "The arch or Gonsequently, the reL of the upper headers can fbe 4easily breken` @0WD whendesired, i i.

Vlin the operation of the furnaee the gases pass,downwardly` throughthe 'nre so that the gases fronrthe1 green fuelpassthrough the" glowing embers p burned sothat no smoke `prf'iduced vby the fire in the furnace. `The water entering into theboiler passes through `the headers and the water bars `which are "exposed directly fire so that a considerable p, is imparted; to "the 4water before passing to" theboilerll The furnace` construction not onlyntilizes tothe bestad vantage the heat produced `by the lire, but also produces a "fire of intense" heat and one in which the smoke is consumed. p The furrnace construction is "described as applied to to the heat of the amount of heat a single furnace arrangedcentrally under a` but it will b e understood thatlit is,` not intended to llmit the invention to this" boiler,

arrangement nor to the number of lire places which may be arranged under a boiler. The drawings show a structure in which both side walls of the lire chamber are composed of water bars, but if desired` one side wall of the fire chamber may be of other suitable structure than that shown.

I claim as my invention l. The combination with a boiler, lof a furnace arranged under the boiler, a plurality of substantially upright water bars spaced at intervals and forming the sides of said furnace, water headers with which the upper ends of said bars connect and which are arranged in engagement with said boiler and extend downwardly from the boiler to form the upper portions of the sides of said furnace, means for admitting air to the furnace into the space between said headers, and connections for permitting water to flow from said headers to said boiler.

may be turned outwardly bars connecting' thellianges or the like from the? and are completely" The icombination *with 1 a boiler, of a furnace arrangedundeithe boiler, a pluralityfof "substantially upright water bars spaced at intervals `and forming the sides `of the furnace,` water headers uarranged in en-` gagement with said `boiler toform substantially air tight connections `therfnvith and havingflanges extending inwardly with regard to` saidrfurnace and means -foradmit` ting air to the` furnace intothe tween said headers, said water bars being connected to said flanges, and connections for "permitting water to flow from Said boilertosaidfheaders.` p p 23, A furnace including a grate, a pluralitylof water bars extending upwardly from` said grate and forming a, retaining wall for a `fire "chamber, said water bars being spaced a't` intervals to `permit gases to vp ass through the` spaces betweenthe bars, "anda header forming theupper end ofthe furnacewall and havinga ,hollow integralflange extend#` ing inwardly with regardy to the "furnace to` forma support for fuel and to which the upper endsfofthe" water bars are connected, said flange having holes through `which the waterfbars may be removed `from the furnace." I l" combination with a boiler, of a furnace arri nged below said boilerand com:-` prising a grate, water bars `arranged in `op`-l erative.relation` to the `grate and forming re`` taining-means fer theffire, saidwater bars4 beino arran edatintervals forming' saces zu i c:

which l air is admitted to the lire chamber l: a.bove the lire, and connections for permit! ting Awater to How between said header and said boiler.

5. The combination with a boiler, of a furnace arranged under the boiler and including a grate, water bars extending upwardly from the grate and arranged at in tervals forming spaces for the passage of gases, water headers at opposite sides of said furnace with which the upper ends of saidW bars connect, said headers being arranged in engagement with the boiler and forming substantially air tight connections therewith, and connections for permitting water to flow from 4said header to said boiler.

6. The combination with a boiler, of a furnace arranged under the boiler and in` cluding a grate, water ybars extending upwardly from the grate and arranged at in tervals forming spaces for the passage of gases, a water header with which the upper ends of said bars connectsaid header being arranged in engagement with the boiler and space be-` the space between said headers, and connections for permitting water to flow from said header to said boiler. l

7 A furnacel including a grate, a plurality of water bars extending upwardly from said `grate and forming a retaining wall for a lire chamber, said water Vbars being spaced at intervals to permit gases to pass through the spaces between the bars, and a header having a hollow flange which extends inwardly with regard to said furnace yto form a support for 'fuel and which is provided with holes in its lower wall through which the upper ends of the water bars extend, and holes in the .upper wall of said flange ar-A ranged opposite to the ends of said water bars through which access may be had t0 the water bars, and means for closing said holes in the upper wall of the flange. t f

.8. The combination with a boiler,of av furnace arranged under the boiler, a plurality of .substantially Lupriglgit. water b ars spaced at intervals and forming the sides of said furnace, water headers with which the upper endsof said barsconnect and v.which arearranged in engagement with said boiler to extend downwardly from the boiler to form vthe upper portions ofthe sides of the furnace, said` headersV forming with said boiler a passage inthe upper part of the below saidboiler for fresh air to pass to the lire, to said passage, and connections for permit ting water to flow from said boiler to4 said headers and water bars.

9. A furnace comprising upper and lower headers arranged at the upper and lower Copies of this patent may be obtained for header and said boiler,I

means for admitting air4 portions lof .the furnace and having laterally extending lianges provided with oppositely disposed holes, `water bars secured at their upper ends in the holes of the upper header and at their vlower ends in the holes in the lower header, openings in'said flanges arranged opposite to said holes whereby access can be had to said bars and whereby parts of the water barscan be inserted into or removedl from their .operative positions, and means for closing said openings.

10. A furnace comprising upper and lower headers arranged at the upper and lower portions of the furnace and havinglaterally extending lianges provided with oppositely disposed holes, water bars, each consisting of two parts, one part extending into a hole in the upper header, the other part extending intoa hole in the lower header, the two parts being welded together vand secured in said holes.- q v 11:. A furnacecomprising upper and lower headers arranged at the upper and lower portions of the furnace, water bars each consisting of two parts, one part extending into a hole in the upper header and the other part extending into ,a hole in the lower header, said headersehaving holes arranged substantiallyin alinementwith said water bars and. opposite to said first mentioned holes through which said water bars may extend when placing the same into or removing them fromthe headers, the two parts of the' water bars being welded together and secured in said first mentioned holes.

Witness my hand this 17 day of October,

i GEORGE SAMUEL KENT.

Witnesses:

M. J PrrMAN, u F. E. PaooHNow.

ve cents each, by addressingthe Commissioner 'of Patents,

Washington, VIl). c." 

